Laundry starch.



NITED STATES MARIA DOROTHEA PETERSEN,

OF OBERJERSDAL, GERMANY.

LAUNDRY STARCH.

SPECIFICATION forming part of Letters Patent No. 649,210, dated May 8,1900.

Application filed July 6, 1899. Serial No. 722,965. (No specimens.)

T0 00 whom it may concern.-

Be it known that I, MARIA DOROTHEA PE- TERSEN, a subjectof the King ofPrussia, German Emperor, residing at Oberjersdal, North Schleswig, inthe Kingdom of Prussia, Germany, have invented certain new and usefulImprovements in the Manufacture of Laundry Starch, (for which I haveapplied for patents in England, No. 11,416, dated June 1, 1899; inAustria, dated June 5, 1899; in Hungary, No. 8,313, dated June 2, 1899;in Germany, dated May 25, 1899, and in Denmark, No. 584:, dated May 30,1899,) of which the following isa specification.

Of the ordinary kinds of starch employed for starching and getting upclothes, linen, and textile fabrics generally rice-starch is mostusually employed, because it has very great advantages as compared withthe other ordinary kinds of starch,such as maize-starch, wheat-starch,and especially potato-starch. This is doubtless due to the fineness ofthe particles of rice-starch, which with the aid of a microscope can bereadily seen to be the finest of the ordinary starch-flours; but evenrice-starch has great drawbacks when used for starching clothes, &c.,and dark-colored materials (dark blue, dark brown, or black, 850.)cannot be starched with the ordinary starches procurable in the marketwithout becoming gray and spotted.

Now the present invention has for its object to obviate these drawbacks.This is effected by manufacturing a laundry starch of peculiarcomposition, which has very great advantages as compared with thelaundry starches heretofore employed.

This improved laundry starch is made by mixing together sago-flour,(which is the finest of all starch-flours,) dextrine,and common salt insuitable proportions. All these materials are well mixed together in thedry state. Then the mixture is first stirred with a little cold water,and finally stirred up with some boiling water, which is poured slowlyinto it. All boiling of the mixture must, however, be avoided. Thefollowing proportions of the ingredients have been found suitable: fiveparts, by weight, of sage-flour; two parts, by weight, of common salt;and one part, by weight, of dextrine. These proportions may, however, bevaried.

By using laundry starch prepared in the manner above described forstarching linen, &c., all grayness and spotted appearance is avoided andthe linen acquires a much more lustrous gloss than could be producedwith the laundry starch hitherto employed.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is-

Starch for linen and the like consisting of sago in the form of meal,salt (common salt) and dextrine, substantially as set forth.

In testimony whereof I have hereunto set my hand in the presence of twowitnesses.

MARIA DOROTIIEA PETERSEN.

Witnesses:

HEINRICH PETERSEN, E. H. L. MUMMENHOFF.

